I admire your willpower in the fight against smoking and understand that even if you really want to quit, you might have difficulties on the way to reach it.
I think that the greatest fear you might have is not to cope with all the difficulties in order to get rid of tobacco dependence.
But your friend and wife really care about you and help you not to give up. That was new for me to find out that the government actively helps people who are trying to quit by providing free nicotine gum and nicotine patches.
I think you are on the right track and sport activities will strengthen your willpower!